1500HP on pump gas, Wow!!
 

I think Pyburn is running Chief 1700's in PP & he runs on 93 octane.

You are correct. I watched those dyno pulls as Tommy did them and am a witness to 1700 plus on "Street" 93.

The $$$/running hour numbers for these engines must be obscene...

1500 n/a horsepower on 91!!!! That's a big deal!! Wow

880 CI :eek: holy deep breath'in mo fo!

The engine management software is the key to fine tuning these monsters. Truly at this point the limit is fuel quality...the mapping software tells you real quick where octane limits timing advance/power. Tommy's software has a unique sensor that isn't only a knock sensor but measures the best audible qualities of the actual combustion explosion and adjusts fuel/air/ignition to duplicate the optimum "audible" characteristics of each combustion cycle. What's even more mind boggling is that he can sit at his desk and measure/change these characteristics in a clients engine remotely...anywhere!!!

I wouldn't have believed it if I had not seen it....the paradigm shift in the technology of these engine management systems is mind boggling!!

Think about it...we're having a discussion about marine engines producing 1500-1700 reliable HP on readily available pump grade gasoline!!! Unbelievable.

Sonny has been building Ultimate Naturally Aspirated Marine Engines for quite some time now. I believe the Hawk 1000 engine of decades past was his design.

no chit 5.5" stroke....

Imagine what a pair of those with CMI's would sound like running across the water (-: